Question

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15 (x +2) = 30 - 12x

Answer 1

15(х+2)=30-12х

15х+30=30-12х

0=-17х

х=0 

Answer 2

Решение:

15(x+2)=30-12x

15х+30=30-12x

15х+30-30+12х=0

17х=0

х=0